$\left(-4+w\right)\left(-4-w\right)$
$\lim_{x\to0}\left(\frac{cos\:3x-2cosx}{sen^22x}\right)$
$52-0.7$
$\left(z-2\right)^2$
$3z^2-15z+10=0$
$x-4<x\cdot\left(x-3\right)$
$8-3-9-2+6+4+11-18$
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